Influence of moisture absorption on creep of GRP composite pipes

Experimental investigation of the effect of aging on perforated composite tubes under axial compressive loading

“…Moreover, the plasticization that occurred in the matrix reduced its stiffness considerably and also reduced the cohesion of the fiber/matrix interface, thus giving a greater chance for fiber pullout. Guedes et al [11] studied the effect of moisture absorption on the creep response of glass-fiber/thermosetting-matrix composite pipes. As a conclusion, they stated that the use of the power law relationship could provide a good prediction of the long-term response of such pipes.…”

Simulation of the long-term hydrostatic tests on Glass Fiber Reinforced Plastic pipes

“…Performing a review on literature, it can be seen that very limited studies have been performed on the long-term creep evaluation of GFRP pipes [5][6][7][8][9][10][11][12][13][14].…”

“…It is concluded that the timesuperposition principle is the same for static, creep and fatigue strengths [11]. Guedes et al [12] studied the influence of moisture absorption on long-term creep behavior of composite pipes. Experimental creep data obtained from standard test methods for unconditioned and preconditioned specimens under ring deflection conditions were used.…”

“…The time-temperature superposition principle (TTSP) and extrapolation using a power law relation were applied to DMTA data for long-term creep prediction. They have found that both methods are conservative and predict higher stiffness reduction than the creep tests [12].…”

Full-scale field test for buried glass-fiber reinforced plastic pipe with large diameter

“…The long-term behavior of the GFRP pipes was investigated in relation to the moisture and creep, deflection prediction, prediction method, etc. [13][14][15].…”